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What is DNA replication and how does the cell cycle regulate cell division?

DNA replication is the production of two identical DNA strands from one original DNA molecule and is a nearly error-free process that occurs in all living organisms. This is because, in order for a cell to d...
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Answered by Azeem A. • Biology tutor
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What is the difference between a gene and an allele?

A gene is a section of DNA or RNA that codes for a protein. Alleles are different versions of the gene. For example, if a gene coding for a particular enzyme mutated, then there would be two alleles of the g...
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Answered by Ellen P. • Biology tutor
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What is the difference between interspecific competition and intraspecific competition?

Define competition: competition is an interaction between organisms where one organism has a negative effect on the fitness of the other organism Define interspecific competition : competition between organi...
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Answered by Zoe G. • Biology tutor
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How does an invading pathogen cause disease?

There are three main ways that an invading pathogen can result in disease: Damage or destroy host cells This is host specific and ligands on the pathogen must fit host receptor proteins on the host cell. Thi...
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Answered by Jenny C. • Biology tutor
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How are blood glucose levels controlled in the body?

Blood glucose is controlled by a negative feedback mechanism. When blood glucose levels rise, this is detected by beta cells in the Islets of Langerhans in the pancreas. In response, they secrete insulin whi...
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Answered by Emily K. • Biology tutor
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